SPOTDIR

 The SPOTDIR card is used in conjunction with SPOTBEAM, SPOTPOS, SPOTTIME,
 and SPOTTRAN to define multiple beam spots. A new primary is created randomly
 in any of the listed beam spots according to their respective weight
 or in sequential order (see SPECSOUR).

 Warning : These five cards are activated by indicating 
SDUM
 = BEAMSPOT
 in the  SPECSOUR card. Barring this, the spot cards will be discarded.

 See also SPOTBEAM, SPOTPOS, SPOTTIME, SPOTTRAN


    
WHAT(1)
 = x-cosine of the beam spot
              
Default
 : see below

    
WHAT(2)
 = y-cosine of the beam spot
              
Default
 : see below

    
WHAT(3)
 = z-cosine of the beam spot
              
Default
 : see below

    
WHAT(4)
 = x-cosine  of the beam "x-axis"
              
Default
 : see below

    
WHAT(5)
 = y-cosine  of the beam "x-axis"
              
Default
 : see below

    
WHAT(6)
 = z-cosine  of the beam "x-axis"
              
Default
 : see below

    
SDUM
 :  Beam spot number (free format)
              
Default
: n, the number of the last defined spot


     
Notes:
         1) If 
WHAT(1)
 = 
WHAT(2)
 = 
WHAT(3)
 = 0, the beam direction as
            defined by {BEAMPOS} is used.
         2) If 
WHAT(4)
 = 
WHAT(5)
 = 
WHAT(6)
 = 0, the beam x-axis direct-
            ion as defined by BEAMPOS/BEAMAXES is used, if the beam
            x-axis is indeed defined, the beam z-axis is the beam
            direction and the y-axis is computed accordingly
         3) If no SPOTDIR card is issued for an otherwise (via SPOTBEAM)
            defined beam spot, the spot direction and axes are taken from
            the BEAMPOS and BEAMAXES cards, assuming the beam along the
            z-axis of the beam reference frame

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